13256239 has 2 divisors, whose sum is σ = 13256240. Its totient is φ = 13256238.

The previous prime is 13256237. The next prime is 13256333. The reversal of 13256239 is 93265231.

13256239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (93265231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13256239 - 2¹ = 13256237 is a prime.

Together with 13256237, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13256239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13256237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6628119 + 6628120.

It is an arithmetic number, because the mean of its divisors is an integer number (6628120).

Almost surely, 2^13256239 is an apocalyptic number.

13256239 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256239 is an equidigital number, since it uses as much as digits as its factorization.

13256239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 13256239 is about 3640.9118363399. The cubic root of 13256239 is about 236.6683094069.

The spelling of 13256239 in words is "thirteen million, two hundred fifty-six thousand, two hundred thirty-nine".